Phycology Section, Patrick Center for Environmental Research, Academy of Natural Sciences of Drexel University. Achnanthes joursacense (NADED 2248). https://diatom.ansp.org/taxaservice/ShowTaxon1.ashx?naded_id=2248. Accessed 14 Aug 2018. This web service reports all information about a given algae taxon available at the time of retrieval.